Preheat oven to 375 degrees F.
Beat the eggs, sugar, and salt for about 2 minutes at high speed, until they're thick and light-colored.
Stir in the flour, espresso powdered, the cooled, melted butter; vanilla, then the chocolate chips or chunks and the diced pecans.
Pour the batter into the unbaked pie crust, then press the remaining 2/3 cup pecan halves on top.
Bake the pie for 30 minutes. Tent it lightly with aluminum foil, and bake for an additional 15 minutes, till the crust and top are both golden brown.
Remove the pie from the oven, and allow it to cool for about 30 minutes before serving. Top with ice cream or whipped cream, if desired.
Yield: one 9" pie, about 8 to 10 servings.